A Vertical Reflection Ionospheric Clutter Model for HF Radar Used in Coastal Remote Sensing
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Bibliographic record
Abstract
A theoretical model of the high frequency (HF) radar ionospheric clutter for the case of vertical incidence is presented in this letter. Assuming a pulsed dipole source, the equation of the received electric field after vertical reflection by the ionosphere is first derived. Then the relationship between the ionospheric reflection coefficient and the ionospheric electron density is incorporated into the development of the ionospheric clutter power model. In order to investigate the power spectrum of this ionospheric clutter and its relative intensity to that of the first-order ocean clutter, the normalized ionospheric clutter power is simulated. Simulation results show that the horizontal ionospheric plasma drift velocity results in a Doppler spreading while the vertical motion introduces a simple Doppler shift.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it